4 large Portobello mushrooms, stems trimmed
1 tsp garlic powder
700g/1lb 9oz russet potatoes, peeled and cut into 1cm/陆in-thick batons
3 shallots, finely chopped听
4 sprigs fresh thyme
1 tsp chopped fresh thyme
150驳/5陆辞锄 watercress
1 tbsp Dijon mustard
flaky sea salt and freshly ground black pepper
pinch freshly ground black pepper
1 tsp cornflour
1 tbsp olive oil
pinch flaky sea salt
3 tbsp vegetable oil
120ml/4fl oz unsweetened plant-based cream
240ml/8陆fl oz dry white wine听